(Activity updates are written by scientists at the U.S. Geological Survey’s Hawaiian Volcano Observatory.)

A close-up view of one of the many breakouts of pāhoehoe on the Kahaualeʻa 2 flow. Photo courtesy of USGS/HVO

A lava lake within the Halema‘uma‘u Overlook vent produced nighttime glow that was visible via HVO’s Webcam during the past week. A deflation-inflation cycle (DI event) occurred last weekend, and the lava lake level fell and then rose again, correspondingly. No subsequent DI events had occurred as of this writing (Thursday, October 24).

On Kīlauea’s East Rift Zone, a breakout from the Peace Day tube above the pali was still barely active on Monday, October 21, based on field observations. The Kahauale‘a 2 flow, fed from a spatter cone on the northeast edge of the Pu‘u ‘Ō‘ō crater, continues to slowly advance across old flows and into the forest. Its tip was 5.8 km (3.6 miles) northeast of Pu‘u ‘Ō‘ō on October 21.

One earthquake was reported felt on the Island of Hawai‘i during the past week. On Sunday, October 20, at 11:44 a.m., HST, a magnitude-3.7 earthquake occurred 13 km (8 mi) north of Nā‘ālehu at a depth of 10 km (6 mi).

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Time-lapse movie of the Peace Day Flow area

Small-scale map showing Kīlauea’s east rift zone flow field as of October 21, 2013. The Peace Day flow (light orange), remains active…barely. One small breakout continues to leak from the tube on the upper flow field. The tube below this point has likely been abandoned, and no lava is reaching the coastal plain or entering the ocean. Near Puʻu ʻŌʻō, the Kahaualeʻa 2 flow is still active northeast of Puʻu ʻŌʻō. The Kahaualeʻa 2 flow and the breakout from the Peace Day tube as of October 10 are shown in pink, while expansion of both flows as of October 21 are shown in red. Older lava flows are labeled with the years in which they were active: episodes 1–48b flows (1983–1986) are shown in gray; episodes 48c–49 flows (1986–1992) are pale yellow; episodes 50–55 flows (1992–2007) are tan; and episodes 58–60 flows (2007–2011) are pale orange. The active lava tubes are shown with yellow lines. Map courtesy of USGS/HVO